Introduction

Navigation lights are used to prevent collisions at night or in times of reduced visibility.
Vessels are required to show the proper navigation lights from sunset to sunrise in all weather conditions and in conditions of reduced visibility.
All vessels must display basic navigation lights. These lights indicate:
– Whether a vessel is under sail or power.
– The direction of the vessel.
– The likely size.
– The activity.
Additional specific sets of lights are used by vessels to indicate that they are engaged in a specific job or that they are under restrictions.